Ministry of Home affairs
The Central Intelligence Agency (CIA), the National Security Agency (NSA), and the Federal Bureau of Investigation (FBI) are all agencies under the control of the Director of National Intelligence (DNI). The Defense Intelligence Agency (DIA) is the agency not under the DNI's control, as it falls under the Department of Defense.
Center for National Security and Investigation
The FBI is an agency of the United States Department of Justice.
Technically, it was established under the direction of President Theodore Roosevelt by then Attorney General Charles Bonaparte. Bonaparte opened the Bureau of Investigation under the Justice Department on 26 July 1908. In 1909 it was merged with the Bureau of Prohibition and renamed the Division of Investigation. In 1935, under the Directorship of J. Edgar Hoover, the department was made an independent agency and renamed the Federal Bureau of Investigation.
why is your bank account under investigation by your bank?
It"s historic, of course, but is classified as a National Park under the National Park Service- department of the Interior- a govt. agency.
no
The science of investigation
The CIA is an independent agency and does not "fall under" any of the departments under the Executive Branch. A good reference for these types of questions is www.usa.gov
Proof that someone is being paid 'under the table' could be obtained through video/audio records which would probably best be obtained by a licensed private investigation agency.
Under the Official Information Act (or equivalent), you can ask your school or the Ministry of Education (or equivalent) for averages and comparisons to national/regional/local scores.
By the intermediate of IAEA (International Atomic Energy Agency) between different countries; in a country, under the specific national regulations.